Travel verticals a danger to Google?

Dutch travel site Easytobook.com has released a press release in which it states that more and more travel sites prefer the use of verticals over Google Adwords.

Travel comparison sites like Kayak.com combine real-time data like prices and availability of several reservation search engines. They now are moving away from Google towards verticals.

According to the press release visitors still start with a search on Google, but then mostly choose for verticals when these are shown in the Google results. They then do not return to Google.

Easytobook itself used to mainly work with Google but started to make the shift early 2009. Now 30% of all traffic comes from verticals and they are planning to make that 50%.

Google itself will probably return with new features in the future to keep the visitors returning to Google. In the Google Q2 Earnings Call 2009 Eric Schmidt said Google is working on more vertical search options, but that they are not ready to roll them out just yet.